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Give the decreasing order of melting poi...

Give the decreasing order of melting points of the following `NH_(3),PH_(3),(CH_(3))_(3)N` Explain
(b) In which molecule is the van der Waals force likely to be the most important in determining the m.pt and b.pt for `ICI,Br_(2),HCI,H_(2)S,CO` .

A

`CO`

B

`H_(2)S`

C

`Br_(2)`

D

`HCI`

Text Solution

Verified by Experts

The correct Answer is:
c
`Br_(2)` is non polar molecular and hence its molting and boiling points depend only on Van der Waals forces while all order molecular are having dipole moment hence their melting and boling point depends upon dipole-dipole interactions.
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The decreasing order of melting points is NH_(3) gt (CH_(3))_(3) N gtPH_(3) .

Which is expected to have the highest melting point : NH_(3),(CH_(3))_(3)N or PH_(3) ? Explain why?

Knowledge Check

  • In which of the following molecules, the van der Waals forces are likely to be the most important in determining the m.pt, and b.pt?

    A
    `CO`
    B
    `H_2S`
    C
    `Br_2`
    D
    `HCl`

  • In which of the following molecules the van der Waals forces are likely to be the most important in determining the mpt. and b.pt.?

    A
    CO
    B
    `H_2S`
    C
    `Br_2`
    D
    HCl

  • In which of the following molecular the Van der Waals forces is likely to be most important in determining and the melting and the boiling points ?

    A
    CO
    B
    `H_(2) S `
    C
    `Br_(2)`
    D
    HCl

    • Similar Questions

    Explore conceptually related problems

    Which is exprected to have highest melting point : PH_3, NH_3, (CH_3)_3-N ? Explain.

    Using IUPAC norms, write the systematic names of the following: [Pt(NH_(3))_(2)Cl(NH_(2)CH_(3))]Cl

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    Which of the following is correct regarding [Pt(NH_(3))_(2)(CN)_(2)] ?

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